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How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation? What could you do if you actually have the data? In my case, the sample size is 1000, mean 40, and SD 10.
If you then took a sample of 20 from the original sample of 1000, is the expected value 40? How do you find the standard deviation for the sample of 20?
What is the probability you pick a plum and Which of the following is a legitimate probability distribution for this situation
Compare 2 moving averages using MSE and compute Exponential smoothing. The subsiquent data which represents demand for company ABC's products for the last 10 months.
Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
Evaluate 2-month moving average and Exponential smoothing by MAD.
Testing for population mean - How would this information be useful to you if you were the college register?
Given that this sample is extremely large, can the responses be considered to be representative of the population of the United States? Explain.
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
A company has set a goal of developing a battery that lasts over 5 hours in continuous use in a sample of 42 of these batteries the mean life time was 306.25 hours with a standard deviation of 29.31
The researcher in exercise decides to conduct the same study using a within - participates design to control for differences in cognitive ability.
A test was conducted to find out whether gender of a spokesperson affected the likelihood that consumers would prefer a new product. A survey of consumers at trade show employing a female spokesperson determined that 70 out of 150 customers prefe..
Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
Determine the number of successes suggested by the given statement.
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